Drawing-press



6 Sheets-Sheet 1.

(No Model.)

N. MS. S Gm MD.. LG HW TD P.

No. 562,360. -Paten'tedune 16, 1896.

ghi/210054054 (No Mode1.)\

. P. F; HOLD/IGRBN.

' DRAWING PRESS.

No. 562,360.. PatentedJune 165 1896..

INVENTR- 4 WITNEEEEE.

6 Sheets-Sheet 2,

" (No Model.) 6 Sheets-Sheet 3.

BPHOLMGRBN. DRAWING PRESS.

No. 562,360g-' 'Patented June l16, 1896.

- amb@ @(44% y @f/fw m .TJ e m m e e h S 6.. N Es. RS Gm MDL LG Om HW M PD P. m. M O m No. 562,360. Patented June 16, 1896.

e Smetssheet 5,

Patented June 16, 1896.

f DRAWING PRESS.

P. P.' HOLMGREN'.

(No Model.)

6 Sheets-Sheet 6.

(No Model.)A l P. 'F.HOLMGREN.

DRAWING NESS,"

No. 562,360.. l Patented June T1896.

mrs. STATES.

Alberti4 eine@ rnaAwlree-iassys.`

SPECIFICATION forming part of Letters Patent No. 562,360, dated June 16, 1896.

' Appiio'aion nea April 11,1895.

To alt whom t may concern:

e it known that l, PER F. IIOLMGREN, a citizen of the UnitedStates, and a, resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Drawing-Presses, of

which the following is a specication.

M y invention relates Ato means for causing the dwellor rest ofthe blank-holder while holding the blank and is designed to provide for more positive `and unvarying dwell, and for simpler and better apparatus for4 actuating the blank-holder, said apparatus being also useful for other purposes, as for Working holder.

an intermittently-rec1procating device, as a feeder for a press or the like, as hereinafter. described, reference being made to the accompanying drawings, in which` v- I Figure l is a side elevation 'of my improved drawing-press. Fig. 1a is a side elevation with part of the housing detached. Fig. 2 is a'front elevation. Fig. 2a is a sectional elevation on line y y, Figs. 2 and 3. Fig. 3 is a top or plan view. Fig. 4 is a side elevation of the rock-shaft for working the blank- Fig. 5 is a transverse section of the said rock-shaft o'n the line m as. Fig: 6 is a by which motion is transmltted from the rockshaft to the blank-holder and the dwell of the blank-holder is effected, with dotted lines indicating the operations. Fig. 7 is a plan view of the said jointed connecting-rod. Fig. 8 is a top view of a bell-crank by which said jointed connecting-rod is coupled with the blank- Fig. 9 is a side elevation of said belll crank. Fig. 10 is atopa view of the blankholder and drawing-punch. Fig. 1l is a sectional elevation of the blank-holder and drawing-punch on the line .y y of Fig. 3.l Fig. l2 is a. sectional elevation of the blank-holder and punch onvthe line ,e e' of Fig. ll. Fig. 13 is a side elevation of duplex apparatus for aotuating the blank-holder better adapted for largepresses; and Fig. 14 is a side elevation of apparatus, illustrating theapplication of the blank-holder-actuating mechanism for an intermittent feeder suitable for stamping'-` presses and other machines. Fig. l5 is an 5o elevation of a drawing-press having my improved blankholderactuating apparatus Serial'No. 545,29. (No model.)

and being' organized so that both the blankholder andthe drawing-punch are operated by the rock-shaft, wh ich is an economical feaelevation of the apparatus of Fig, l5. 'Fig 17 is a sectional elevation ofthe apparatus represented in Figs. l5 and 1G, the section being taken transversely to the crankshaft at the middle or thereabout of the front view in Fig. l-G. Fig. 18 is a front view of part of the machine represented in side view in Fig. 13 with some parts in section, and Fig. 19 is a front'elevation of the apparatus of Fig. 1lC with apart in section. Figs'. l, 2, and are drawn to a smaller scale than the rest.

The main shaft c, to which the poweris applied by a pulley l), 1s coupled by a rod c and Vture ofthe improvement. l Fig. lGis a front c, but lower and Aback of the vertical plane of thedriVing-shaft, in whiclLthe blankholder g and the drawing-punch h are located; but the rock-shaft may have any other approved meansof operating it, as. the lever iny Figs. l5, 16,-and 17.` This rock-shaft has a crank z' in the central .plane y y of the machine, from which motion is transmitted to the blank-holder g by the knuckle-jointed connecting-rodj la, bell-crank l, and the links fm. The rock-shaft may however be placed higher or in any suitable location. This connectingrod, composed of Ythe said two parts j 7c, .is coupled by a knnckle-joint allowing it to articulate in one direction but positively limiting it against iiexure in the opposite direction. The 'pivot n of this joint projects at one or both ends beyond the sides of the fork o of the connecting-rod and the crank t has a channel or channels j), .admitting said projection to the axis of the rock-shaft, where they lodge and then serve as the pivot of part j of the connectingnod when in the course of the down movement of the blank-holder the wrist-pin q,'said axis, and the pivot t of the other extremity ofthe connecting-rod come into a right line, as indicated by the 'dotted' lines in Fig. 6, which is timed to occur at the,A moment-the blank-holder reaches the rightpoint in relation to the blank and the die for y holding it.

Then the part j of the connecting-rod swings with' the crank 1I during the rest of the forward movement of the rock- IOO duri cf which time the blank-holder rests and pe rvcly and unvaryinglylield in position.. One of the parts et this connccting-red, as it', made extensible by the swivel-screw w, or otlierapproved means to adjust the parts with e tctness. y

Two links m are employed in connecting,l the hell-crank l and lthe blank-holder at opposits et the -drawingpunch which werks in the center of said holder and to have better control for causing the blank-holder to seat fairly en the blank, which is important in viewet the large area ol the face of the blanknhelder, which demands great nicety of adjustment. l.

The bed-die, which is to be el. the common forni and will be' located on the supporting bed-plate, as usual in such machines, is not shown in the drawings, as it forms no'part oi the invention claimed.

For large presses it is desirable to duplicate the blank-heider-actuating devices `for distributing the stresses, and for greater ease of operation, which may be carried ont in various arrangements, one of which l have represented in Figs. i3 and 18, wherein two rockshatts f and cranks t" are employed on opposite sides et thewertical plane of the crankshaft, withtwo connecting-rods, asf/t, whichy maybe connected at with the cross-head o, connected te the blank-holder g2 by anvia'pproved means, as links 7l. rthe drawingpnnch fa* is connected to crank-shaft a, as in the other arrangements. '.lhe cranks c' of these roclcshaits are connected by links d with a `voke L', coupled by eonnertingeod c' with the crank d ot' the main driving-shaft. The connecting-rodsj' 7J have like knucklejoints and the rock-shaft cranks have corresponding channels'p, (dotted lig. lik) admitting the extension-pivots It' to the axis. ot" the rock-shafts l'or articulation of the yjoints while the blank-holder is at rest.

ln Figs. l/l and lt) l represent an arrangement whereh';v the same articulating connecting-red and rock-shaft may be employed for operatingm a reciprocating device,'as the slider L15, which may be utilized as an intermittent l'eedcr, as 'for fcecingblanks, te a press and the like where a lomoI dwell of the feeder is required. Yln this case the rockshalt f0J is represented as `eeared by a toothed pinion gwith a reciprocating toothed rack h2, connected by red t2 with the crank jg of the main shaft o suitably for being rocked forward and backward, and the jointed conncctmg-rodjgI le is connected with the ycrank of said rocks-hatt, said crank having like channels p, and

the-conncctihg-rod having like pivot exten sions n.3 for lodging in the axis .ot the crank.

shaft and interrupting the transmission of dion by the conneci.ingrod. v t will be Seen with this improved apparatus of my inieasible to cause the dwell of die, whereon it comes to rest the blank-lnilder d u ring nearly a half-revolution ofqthe punch-driving shaft, and to vary it to any desired limit olf less extent'.

in lgigs. l5, 1G, and 17 I represent a simple and economical construction ot' presses in which it is made feasible by my invention to utilize the rockshatt for working both the blank-holder and the drawing-punch. In this case the blank-holder y issuspended directly from the rock-shaft fi by a pair ot' knucklejointed connectiug-rodslj v, or it may be by one only, and cranks i', and preferably so that it works upwardly against a stationary bed withthe blank upon its upper. face when the cranks from which it is suspended pass the upper center, and the drawing-punch n isgeared with an intermediate cra-nk ml of the rockshaft, the sanTe as in Athe other plans, said crank being set in suitable relation to the others for the punch to take effect on the blank, when the blank-holder comes to rest or immediately thereafter, and draw it downward v'in the bore of the blank-holder, which is in this case the drawing-dic.

rlhe rock-shaft may be worked by a handlever, o?, in the case et small presses, or it may be geared by a crank and connecting-rod with a rotary driving-shaft, as in Fig. l.

l claim as my invention-- "1. The combination of the rock-shaft havn ing a crank, a knuckle-jointed rod connected witnthe crank, and nieans'to cause the pivotot the knuckle-joint to lodge and rest in the axis of the rock-shaft and maintain one per tion of the rod at rest during the further movement of the other portion with the crank substantially as described.

2. rlhe combination ot' the rock-shaft, the crank of said rock-shaft having the lateral channel or channels into the axis of the roel@ shaft and the knuckle-jointed connecting-rod having a pivot extension or extensions of the kn tickle-,joint adaptedte enter tid channel or channels and lodge in the axis of the shaft to permit one portion of the rod to rest during further swing,` of the other portion of said rod' with the crank substantially as described. 1

il. 'lhe combination ot' the rock-shaft., the

ycrank of said shaf t having` the lateral channel or channels into the axis ot the rock-shaft, and the knuckle-jointed connecting-rod one partr ot which is ot equa-t length with the crank, and said joint has a pivot extension or extensions adapted to enter said channel or channels and lodge in the axis olf the shaft to permit one portion. of the rod to rest during the 'further movement of the other portion of said rod with the crank substantially as described.

the yknuckle-joiut tolodvge and rest in the axis.

of the'rock-shalt andnnaintain one portion of IOO IIC

the rod at fest during further movement of the other portion with the crank, ,a blanka. pivot extension or extensions ofthe knucklejoint adapted to ent-er said channel or channels and lodge in the axis ofthe shaft to permit one portion of the rod to rest and` maintainV theblankl-holder-at rest while the other portion of said rod has furti] er movement with the crank substantially as described.

6. In adrawing-pi'ess, the combination with the bianleholden, of a rock-shaft,'the crank of said shaft having al lateral channel orchannels into the axis of theV rock shaft, the knuckle-jointed connectingnoci coupled with said crank, and the beii-ci'ank coupled with said connecting-redand the biank-hoiden-and having a pivot extension or extensions of the knuckle-joint adapted to enter said channel or ehanneis and lodge in the axis of the shaft to permit one portion of the connecting-rod to rest and maintain the blank-holder at rest while the other portion of said'rod..hasfnrther movement-with the crank substantially as described. y a 7 In a drawingpress the combination of a rook-shaft having a crank, a blank-holder, a

knuckle-jointed rod connecting said blank# Vhoideif with `the crank, means to canse the pivot of the knue'kiejoint of said rod te odge and ,rest in the axis of tile crank-shaft and maintain the blank-holder at rest during paint of the movement of the cank and a di'awin punch, also connected to a crank of said rockshaft and tim-ed with ielation to the 'blank- .holdenior taking eect on the blank 'While the biank-hoider is at rest substantially as described.

' 8. In adrawing-press, the combination of` the rock-shaft, a b1ank-hoiderrone or more knuckle-jointed coniiecting-ods suspending the blank-beider from one or more cranks, of said rock-shaft, means to cause the pivot or pivots of said connecting rod oi rods to iodge in the axis' of the crankshaft `and maintain the blank-holder at reet dating". part of the movement of the crank or cranks, a station.- aiy die located over the biank-hoider, and a drawing-punch also connected to a eran-ic oi' said shaft and timed with relation to the biaicholder for taking effect on the 'blank whifie the bianieholder is at rest substantially as described. i Y

Signed at New York city, in the county and State of New Yorkthis 28th dayof ide'nsn-4 ary, A. D. 1895.. A PER F. HOLMGREN.' fitnessen :A v i 4 W. J. MORGAN, RA. THAYER. 

